/*
 * This file is part of Cleanflight and Betaflight.
 *
 * Cleanflight and Betaflight are free software. You can redistribute
 * this software and/or modify this software under the terms of the
 * GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * Cleanflight and Betaflight are distributed in the hope that they
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software.
 *
 * If not, see <http://www.gnu.org/licenses/>.
 *
 * Author: jflyper
 */

#include <stdbool.h>
#include <stdint.h>

#include "platform.h"

#ifdef USE_UART

#include "drivers/system.h"
#include "drivers/dma.h"
#include "drivers/io.h"
#include "drivers/nvic.h"
#include "drivers/rcc.h"

#include "drivers/serial.h"
#include "drivers/serial_uart.h"
#include "drivers/serial_uart_impl.h"

#ifndef UART1_TX_DMA_CHANNEL
#define UART1_TX_DMA_CHANNEL NULL
#endif
#ifndef UART1_RX_DMA_CHANNEL
#define UART1_RX_DMA_CHANNEL NULL
#endif
#ifndef UART2_TX_DMA_CHANNEL
#define UART2_TX_DMA_CHANNEL NULL
#endif
#ifndef UART2_RX_DMA_CHANNEL
#define UART2_RX_DMA_CHANNEL NULL
#endif
#ifndef UART3_TX_DMA_CHANNEL
#define UART3_TX_DMA_CHANNEL NULL
#endif
#ifndef UART3_RX_DMA_CHANNEL
#define UART3_RX_DMA_CHANNEL NULL
#endif
#ifndef UART4_TX_DMA_CHANNEL
#define UART4_TX_DMA_CHANNEL NULL
#endif
#ifndef UART4_RX_DMA_CHANNEL
#define UART4_RX_DMA_CHANNEL NULL
#endif
#ifndef UART5_TX_DMA_CHANNEL
#define UART5_TX_DMA_CHANNEL NULL
#endif
#ifndef UART5_RX_DMA_CHANNEL
#define UART5_RX_DMA_CHANNEL NULL
#endif
#ifndef LPUART1_TX_DMA_CHANNEL
#define LPUART1_TX_DMA_CHANNEL NULL
#endif
#ifndef LPUART1_RX_DMA_CHANNEL
#define LPUART1_RX_DMA_CHANNEL NULL
#endif

const uartHardware_t uartHardware[UARTDEV_COUNT] = {
#ifdef USE_UART1
    {
        .device = UARTDEV_1,
        .reg = USART1,
#ifdef USE_DMA
        .rxDMAChannel = DMA_REQUEST_USART1_RX,
        .rxDMAResource = (dmaResource_t *)UART1_RX_DMA_CHANNEL,
        .txDMAChannel = DMA_REQUEST_USART1_TX,
        .txDMAResource = (dmaResource_t *)UART1_TX_DMA_CHANNEL,
#endif
        .rxPins = {
            { DEFIO_TAG_E(PA10), GPIO_AF7_USART1 },
            { DEFIO_TAG_E(PB7),  GPIO_AF7_USART1 },
            { DEFIO_TAG_E(PC5),  GPIO_AF7_USART1 },
        },
        .txPins = {
            { DEFIO_TAG_E(PA9),  GPIO_AF7_USART1 },
            { DEFIO_TAG_E(PB6),  GPIO_AF7_USART1 },
            { DEFIO_TAG_E(PC4),  GPIO_AF7_USART1 },
        },
        .rcc = RCC_APB2(USART1),
        .rxIrq = USART1_IRQn,
        .txPriority = NVIC_PRIO_SERIALUART1_TXDMA,
        .rxPriority = NVIC_PRIO_SERIALUART1,
        .txBuffer = uart1TxBuffer,
        .rxBuffer = uart1RxBuffer,
        .txBufferSize = sizeof(uart1TxBuffer),
        .rxBufferSize = sizeof(uart1RxBuffer),
    },
#endif

#ifdef USE_UART2
    {
        .device = UARTDEV_2,
        .reg = USART2,
#ifdef USE_DMA
        .rxDMAChannel = DMA_REQUEST_USART2_RX,
        .rxDMAResource = (dmaResource_t *)UART2_RX_DMA_CHANNEL,
        .txDMAChannel = DMA_REQUEST_USART2_TX,
        .txDMAResource = (dmaResource_t *)UART2_TX_DMA_CHANNEL,
#endif
        .rxPins = {
            { DEFIO_TAG_E(PA3),  GPIO_AF7_USART2 },
            { DEFIO_TAG_E(PA15), GPIO_AF7_USART2 },
            { DEFIO_TAG_E(PB4),  GPIO_AF7_USART2 },
        },
        .txPins = {
            { DEFIO_TAG_E(PA2),  GPIO_AF7_USART2 },
            { DEFIO_TAG_E(PA14), GPIO_AF7_USART2 },
            { DEFIO_TAG_E(PB3),  GPIO_AF7_USART2 },
        },
        .rcc = RCC_APB11(USART2),
        .rxIrq = USART2_IRQn,
        .txPriority = NVIC_PRIO_SERIALUART2_TXDMA,
        .rxPriority = NVIC_PRIO_SERIALUART2,
        .txBuffer = uart2TxBuffer,
        .rxBuffer = uart2RxBuffer,
        .txBufferSize = sizeof(uart2TxBuffer),
        .rxBufferSize = sizeof(uart2RxBuffer),
    },
#endif

#ifdef USE_UART3
    {
        .device = UARTDEV_3,
        .reg = USART3,
#ifdef USE_DMA
        .rxDMAChannel = DMA_REQUEST_USART3_RX,
        .rxDMAResource = (dmaResource_t *)UART3_RX_DMA_CHANNEL,
        .txDMAChannel = DMA_REQUEST_USART3_TX,
        .txDMAResource = (dmaResource_t *)UART3_TX_DMA_CHANNEL,
#endif
        .rxPins = {
            { DEFIO_TAG_E(PB8),  GPIO_AF7_USART3 },
            { DEFIO_TAG_E(PB11), GPIO_AF7_USART3 },
            { DEFIO_TAG_E(PC11), GPIO_AF7_USART3 },
        },
        .txPins = {
            { DEFIO_TAG_E(PB9),  GPIO_AF7_USART3 },
            { DEFIO_TAG_E(PB10), GPIO_AF7_USART3 },
            { DEFIO_TAG_E(PC10), GPIO_AF7_USART3 },
        },
        .rcc = RCC_APB11(USART3),
        .rxIrq = USART3_IRQn,
        .txPriority = NVIC_PRIO_SERIALUART3_TXDMA,
        .rxPriority = NVIC_PRIO_SERIALUART3,
        .txBuffer = uart3TxBuffer,
        .rxBuffer = uart3RxBuffer,
        .txBufferSize = sizeof(uart3TxBuffer),
        .rxBufferSize = sizeof(uart3RxBuffer),
    },
#endif

#ifdef USE_UART4
    {
        .device = UARTDEV_4,
        .reg = UART4,
#ifdef USE_DMA
        .rxDMAChannel = DMA_REQUEST_UART4_RX,
        .rxDMAResource = (dmaResource_t *)UART4_RX_DMA_CHANNEL,
        .txDMAChannel = DMA_REQUEST_UART4_TX,
        .txDMAResource = (dmaResource_t *)UART4_TX_DMA_CHANNEL,
#endif
        .rxPins = {
            { DEFIO_TAG_E(PC11), GPIO_AF5_UART4 },
        },
        .txPins = {
            { DEFIO_TAG_E(PC10), GPIO_AF5_UART4 },
        },
        .rcc = RCC_APB11(UART4),
        .rxIrq = UART4_IRQn,
        .txPriority = NVIC_PRIO_SERIALUART4_TXDMA,
        .rxPriority = NVIC_PRIO_SERIALUART4,
        .txBuffer = uart4TxBuffer,
        .rxBuffer = uart4RxBuffer,
        .txBufferSize = sizeof(uart4TxBuffer),
        .rxBufferSize = sizeof(uart4RxBuffer),
    },
#endif

#ifdef USE_UART5
    {
        .device = UARTDEV_5,
        .reg = UART5,
#ifdef USE_DMA
        .rxDMAChannel = DMA_REQUEST_UART5_RX,
        .rxDMAResource = (dmaResource_t *)UART5_RX_DMA_CHANNEL,
        .txDMAChannel = DMA_REQUEST_UART5_TX,
        .txDMAResource = (dmaResource_t *)UART5_TX_DMA_CHANNEL,
#endif
        .rxPins = {
            { DEFIO_TAG_E(PD2),  GPIO_AF5_UART5 },
        },
        .txPins = {
            { DEFIO_TAG_E(PC12), GPIO_AF5_UART5 },
        },
        .rcc = RCC_APB11(UART5),
        .rxIrq = UART5_IRQn,
        .txPriority = NVIC_PRIO_SERIALUART5_TXDMA,
        .rxPriority = NVIC_PRIO_SERIALUART5,
        .txBuffer = uart5TxBuffer,
        .rxBuffer = uart5RxBuffer,
        .txBufferSize = sizeof(uart5TxBuffer),
        .rxBufferSize = sizeof(uart5RxBuffer),
    },
#endif

#ifdef USE_LPUART1
    {
        .device = LPUARTDEV_1,
        .reg = LPUART1,
#ifdef USE_DMA
        .rxDMAChannel = DMA_REQUEST_LPUART1_RX,
        .rxDMAResource = (dmaResource_t *)LPUART1_RX_DMA_CHANNEL,
        .txDMAChannel = DMA_REQUEST_LPUART1_TX,
        .txDMAResource = (dmaResource_t *)LPUART1_TX_DMA_CHANNEL,
#endif
        .rxPins = {
            { DEFIO_TAG_E(PA3),  GPIO_AF12_LPUART1 },
            { DEFIO_TAG_E(PB10), GPIO_AF8_LPUART1 },
            { DEFIO_TAG_E(PC0),  GPIO_AF8_LPUART1 },
        },
        .txPins = {
            { DEFIO_TAG_E(PA2),  GPIO_AF12_LPUART1 },
            { DEFIO_TAG_E(PB11), GPIO_AF8_LPUART1 },
            { DEFIO_TAG_E(PC1),  GPIO_AF8_LPUART1 },
        },
        .rcc = RCC_APB12(LPUART1),
        .rxIrq = LPUART1_IRQn,
        .txPriority = NVIC_PRIO_SERIALUART6_TXDMA,
        .rxPriority = NVIC_PRIO_SERIALUART6,
        .txBuffer = lpuart1TxBuffer,
        .rxBuffer = lpuart1RxBuffer,
        .txBufferSize = sizeof(lpuart1TxBuffer),
        .rxBufferSize = sizeof(lpuart1RxBuffer),
    },
#endif
};


// XXX Should serialUART be consolidated?

uartPort_t *serialUART(UARTDevice_e device, uint32_t baudRate, portMode_e mode, portOptions_e options)
{
    uartDevice_t *uartdev = uartDevmap[device];
    if (!uartdev) {
        return NULL;
    }

    uartPort_t *s = &(uartdev->port);

    s->port.vTable = uartVTable;

    s->port.baudRate = baudRate;

    const uartHardware_t *hardware = uartdev->hardware;

    s->USARTx = hardware->reg;

    s->port.rxBuffer = hardware->rxBuffer;
    s->port.txBuffer = hardware->txBuffer;
    s->port.rxBufferSize = hardware->rxBufferSize;
    s->port.txBufferSize = hardware->txBufferSize;

    s->checkUsartTxOutput = checkUsartTxOutput;

#ifdef USE_DMA
    uartConfigureDma(uartdev);
#endif

    s->Handle.Instance = hardware->reg;

    if (hardware->rcc) {
        RCC_ClockCmd(hardware->rcc, ENABLE);
    }

    IO_t txIO = IOGetByTag(uartdev->tx.pin);
    IO_t rxIO = IOGetByTag(uartdev->rx.pin);

    uartdev->txPinState = TX_PIN_IGNORE;

    if ((options & SERIAL_BIDIR) && txIO) {
        ioConfig_t ioCfg = IO_CONFIG(
            ((options & SERIAL_INVERTED) || (options & SERIAL_BIDIR_PP) || (options & SERIAL_BIDIR_PP_PD)) ? GPIO_MODE_AF_PP : GPIO_MODE_AF_OD,
            GPIO_SPEED_FREQ_HIGH,
            (options & SERIAL_INVERTED) ? GPIO_PULLDOWN : GPIO_PULLUP
        );

        IOInit(txIO, OWNER_SERIAL_TX, RESOURCE_INDEX(device));
        IOConfigGPIOAF(txIO, ioCfg, uartdev->tx.af);
    } else {
        if ((mode & MODE_TX) && txIO) {
            IOInit(txIO, OWNER_SERIAL_TX, RESOURCE_INDEX(device));

            if (options & SERIAL_CHECK_TX) {
                uartdev->txPinState = TX_PIN_ACTIVE;
                // Switch TX to an input with pullup so it's state can be monitored
                uartTxMonitor(s);
            } else {
                IOConfigGPIOAF(txIO, IOCFG_AF_PP, uartdev->tx.af);
            }
        }

        if ((mode & MODE_RX) && rxIO) {
            IOInit(rxIO, OWNER_SERIAL_RX, RESOURCE_INDEX(device));
            IOConfigGPIOAF(rxIO, IOCFG_AF_PP, uartdev->rx.af);
        }
    }

#ifdef USE_DMA
    if (!s->rxDMAResource)
#endif
    {
        HAL_NVIC_SetPriority(hardware->rxIrq, NVIC_PRIORITY_BASE(hardware->rxPriority), NVIC_PRIORITY_SUB(hardware->rxPriority));
        HAL_NVIC_EnableIRQ(hardware->rxIrq);
    }

    return s;
}
#endif // USE_UART
